Introduce locations based code generation.

runtime/vm/intermediate_language_x64.cc

+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#include "vm/globals.h"  // Needed here to get TARGET_ARCH_X64.
+#if defined(TARGET_ARCH_X64)
+
+#include "vm/flow_graph_compiler.h"
+#include "vm/locations.h"
+
+#define __ compiler->assembler()->
+
+namespace dart {
+
+
+static LocationSummary* MakeSimpleLocationSummary(
+    intptr_t input_count, Location out) {
+  LocationSummary* summary = new LocationSummary(input_count);
+  for (intptr_t i = 0; i < input_count; i++) {
+    summary->set_in(i, UnallocatedLocation::Register());
+  }
+  summary->set_out(out);
+  return summary;
+}
+
+
+LocationSummary* StrictCompareComp::MakeLocationSummary() {
+  return MakeSimpleLocationSummary(2, UnallocatedLocation::SameAsFirstInput());
+}
+
+
+void StrictCompareComp::EmitNativeCode(FlowGraphCompiler* compiler) {
+  const Bool& bool_true = Bool::ZoneHandle(Bool::True());
+  const Bool& bool_false = Bool::ZoneHandle(Bool::False());
+
+  Register left = locs()->in(0).AsRegister();
+  Register right = locs()->in(1).AsRegister();
+  Register result = locs()->out().AsRegister();
+
+  __ cmpq(left, right);
+  Label load_true, done;
+  if (kind() == Token::kEQ_STRICT) {
+    __ j(EQUAL, &load_true, Assembler::kNearJump);
+  } else {
+    __ j(NOT_EQUAL, &load_true, Assembler::kNearJump);
+  }
+  __ LoadObject(result, bool_false);
+  __ jmp(&done, Assembler::kNearJump);
+  __ Bind(&load_true);
+  __ LoadObject(result, bool_true);
+  __ Bind(&done);
+}
+
+
+void BindInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
+  computation()->EmitNativeCode(compiler);
+  __ pushq(locs()->out().AsRegister());
+}
+
+
+#undef __
+
+
+}  // namespace dart
+
+#endif  // defined TARGET_ARCH_X64